Problem $2(35$ pts$)$: Axial$/$Shear$/$Moment @ Specific Points. For the structure shown below, do the following:

a$)$ Calculate its determinacy $(3$ pts$)$

b$)$ Generate the free body diagram $(2$ pts$)$

c$)$ Solve for the reactions and perform one validation $(10$ pts $)$

d$)$ find the bending moment $($M$),$ shear $($V$)$ and axial $($N$)$ internal forces for points $A,C$ and midspans of $AB$ and $BC(20$ points$)$